We're digitizing the construction industry – and integrations are how our customers connect to us.
VESTIGAS is a fast-growing B2B SaaS scale-up. 14 of the top 20 construction companies and 17 of the top 20 suppliers in Germany are already our customers. Every one of them brings a different IT landscape, different data formats, different ERP systems – and that's exactly where you come in.
We're hiring an API Engineer / Integration Engineer to join our growing integrations team. You'll own integrations end-to-end and enable self-service onboarding for our customers.
API Engineer / Integration Engineer (m/f/d)
München (Hybrid)
Full-time
Permanent employee
We're digitizing the construction industry – and we're looking for you to help write the next chapter.
Your Role
You'll join our integrations team and report directly to the CTO. You own APIs and integrations from design to deployment, implement industry-standard data formats (EDIFACT, ZUGFeRD, ebInterface, X-Rechnung), and build the self-service experience that lets customers connect to Vestigas without hand-holding.
You'll work directly with customer IT teams and ERP software vendors – so you're as comfortable in technical specs as you are on a customer call. Tech stack: Python, FastAPI. Hybrid setup with regular office presence at our office in central Munich.
You'll work directly with customer IT teams and ERP software vendors – so you're as comfortable in technical specs as you are on a customer call. Tech stack: Python, FastAPI. Hybrid setup with regular office presence at our office in central Munich.
Your Mission
- Build and maintain robust APIs that connect our platform with external systems (customer ERPs, supplier systems, third-party tools), ensuring data flows seamlessly and reliably.
- Design, implement, and document integrations with industry-standard data formats – EDIFACT, ZUGFeRD, ebInterface, X-Rechnung, and other XML-/EDI-based standards. Mappings, validation, error handling.
- Enable efficient self-service integrations for our customers through world-class documentation, allowing them to connect to their systems with minimal friction.
- Take full ownership of your integrations, from planning and architecture to testing, deployment, and ongoing operation.
- Collaborate cross-functionally with backend, frontend, customer success, third-party providers, and ERP software vendors to deliver integrated solutions that delight customers.
- Write clean, well-tested code and maintain comprehensive API documentation so others can integrate quickly and with minimal friction.
- Put AI agents and tools (Copilot, Claude, Cursor) to work on the tasks they're built for, and focus on the work only humans can do.
Your Benefits
- Real ownership – you own integrations end-to-end, not just tickets
- Direct line to the CTO and a dedicated, growing integrations team
- Visible business impact – every integration you ship unlocks revenue and gets customers live faster
- Modern stack and AI-first workflow – Copilot, Claude, Cursor are part of how we work
- Beautiful office in central Munich, hybrid model with regular office presence
- Construction site visits – you see where your integrations actually land
- Included gym membership, team events, offsites, flat hierarchies
- Domain with substance – not just CRUD APIs, but real data formats, EDI world, ERP integrations
Your Profile
Must-haves:
Nice-to-have:
- 1+ years of experience in Backend / API Engineering (Python preferred, other languages welcome)
- API design skills (REST, ideally OpenAPI/Swagger)
- Clean documentation mentality – you write API docs that people actually read
- Cross-functional collaboration – you've worked with external systems and customer IT teams before
- You're comfortable diving deep into technical documentation and complex data formats
- You actively use AI tools (Copilot, Claude, Cursor) in your workflow
- You are fluent in German (C1+) and English (C1+) – both are required, since customer communication is in German and internal documentation is often in English
- You're willing to be regularly present at our Munich office
Nice-to-have:
- Concrete experience with at least one industry-standard data format: EDIFACT, ZUGFeRD, ebInterface, X-Rechnung, EDI, or similar XML-/EDI-based formats
- B2B SaaS experience in conservative industries (construction, logistics, industrial, wholesale)
- ERP integration experience (SAP, Datev, Sage, Microsoft Dynamics)
- Experience with event-driven architectures (Kafka, RabbitMQ)
- Existing setup with Python stack (FastAPI, Pydantic, SQLAlchemy)
- Startup experience (Seed to Series B)
Why us?
- Real ownership from day one – you own integrations end-to-end, not just tickets
- Visible business impact – every integration you build directly unlocks revenue (sales pipeline depends on it)
- Exciting domain – the construction industry is huge (>10bn € savings potential in Germany alone) and massively under-digitized
- Tech stack with substance – not just CRUD APIs, but real data formats, EDI world, ERP integrations
- Top customers – 14 of Germany's top 20 construction firms and 17 of Germany's top 20 suppliers
- Growing integrations team and direct line to the CTO – short paths, fast decisions
- AI-first mindset – we expect and support the use of Copilot, Claude, Cursor
- Construction site visits – you see where your code actually lands (construction site ≠ office theory)
- Beautiful office in central Munich, hybrid model with flexibility
- Included gym membership, team events, flat hierarchies
Our Commitment to Diversity and Inclusion
VESTIGAS is committed to diverse and equal opportunities hiring for all – applicants, candidates, and employees alike. We value humans – with all our glorious multifaceted backgrounds, perspectives, and experiences – and look forward to your application.
About us
VESTIGAS is a fast-growing startup offering a supply chain operating system for the construction industry. Our solution is the digital, independent and legally secure platforn for orders, delivery notes, and invoices. This will allow us to save >10bn € of costs and several million tons of CO2 in Germany alone. VESTIGAS has already partnered with 14 of the top 20 construction companies and 17 of the top 20 suppliers in the German construction industry. We have quadrupled our team in the last two years and are looking forward to pushing the construction industry to new heights!
We are an passionate team of 55 with a can-do attitude and strong action bias, working out ouf our beautiful office in central Munich. We love working on solutions that are not just incremental improvements, but real leaps within an industry and value great team spirit, going the extra mile for our customers as well as open and transparent communication.
We are an passionate team of 55 with a can-do attitude and strong action bias, working out ouf our beautiful office in central Munich. We love working on solutions that are not just incremental improvements, but real leaps within an industry and value great team spirit, going the extra mile for our customers as well as open and transparent communication.